1 Chronicles 12:13 lists two men, Jeremiah as the tenth and Machbanai as the eleventh, in a sequence of warriors who joined David at Ziklag. This verse is part of a roster naming the skilled fighters who supported David before he became king.
The writer of 1 Chronicles is recording the names and order of notable men from the tribe of Gad who came to help David during a difficult time, when he was fleeing from King Saul. The verse simply identifies Jeremiah and Machbanai by their rank in this group, showing their inclusion among David’s loyal supporters.